August weather forecast
Tokyo, Japan

The cityscape of Tokyo, Japan, taken at dusk
The cityscape of Tokyo, Japan, taken at dusk

Weather in August

The last month of the summer, August, is a tropical month in Tokyo, Japan, with temperature in the range of an average low of 25.1°C (77.2°F) and an average high of 31°C (87.8°F).

Temperature

With an average high-temperature of 31°C (87.8°F) and an average low-temperature of 25.1°C (77.2°F), August is the warmest month.

Heat index

The average heat index in August is computed to be a sweltering 38.5°C (101.3°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'feels like', or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like clothing, wind, differences in body mass, height, and shape, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

The average relative humidity in August in Tokyo is 73%.

Rainfall

In August, in Tokyo, Japan, the rain falls for 9.7 days. Throughout August, 26mm (1.02") of precipitation is accumulated. In Tokyo, during the entire year, the rain falls for 134.5 days and collects up to 425mm (16.73") of precipitation.

Snowfall

In Tokyo, snow does not fall in April through December.

Sea temperature

The month with the warmest seawater is August, with an average sea temperature of 25.7°C (78.3°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

In Tokyo, the average length of the day in August is 13h and 29min.
On the first day of the month, sunrise is at 04:48 and sunset at 18:46. On the last day of August, sunrise is at 05:12 and sunset at 18:10 JST.

Sunshine

August has the most sunshine of the year in Tokyo, with an average of 10.3h of sunshine.

UV index

The average daily maximum UV index in August is 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: In August, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the warmest month in Tokyo?

The warmest month in Tokyo is August, with an average high-temperature of 31°C (87.8°F) and an average low-temperature of 25.1°C (77.2°F).

What is the temperature in August in Tokyo?

In August, in Tokyo, Japan, the average high-temperature is 31°C (87.8°F), and the average low-temperature is 25.1°C (77.2°F). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in August is computed to be 38.5°C (101.3°F).

What is the average humidity in August in Tokyo?

In August, the average relative humidity is 73%.

How many days does it rain in August in Tokyo?

In Tokyo, in August, during 9.7 rainfall days, 26mm (1.02") of precipitation is typically accumulated.

When it does not snow in Tokyo?

In Tokyo, Japan, snow does not fall in April through December.

What month is the sea warmest in Tokyo?

The month with the warmest seawater is August, with an average sea temperature of 25.7°C (78.3°F).

What is the sea water temperature in August in Tokyo?

In Tokyo, in August, the average water temperature is 25.7°C (78.3°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

What is the average length of the day in August in Tokyo?

In Tokyo, Japan, the average day length in August is 13h and 29min.

When are sunrise and sunset in August in Tokyo?

In August, on the first day of the month, sunrise is at 04:48 and sunset at 18:46. On the last day of the month, sunrise is at 05:12 and sunset at 18:10 JST.

What month has the most sunshine in Tokyo?

With an average of 10.3h of sunshine, August has the most sunshine of the year in Tokyo, Japan.

How long on average sun shines in August in Tokyo?

The average sunshine duration in August in Tokyo, Japan, is 10.3h.

How high is the UV index in August in Tokyo?

In Tokyo, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in August
Tokyo, Japan

Average temperature in August - Tokyo, Japan
  • Average high temperature in August: 31°C

The warmest month (with the highest average high temperature) is August (31°C).
The month with the lowest average high temperature is January (8.9°C).

  • Average low temperature in August: 25.1°C

The month with the highest average low temperature is August (25.1°C).
The coldest month (with the lowest average low temperature) is January (2.8°C).

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Average pressure in August
Tokyo, Japan

Average pressure in August - Tokyo, Japan
  • Average pressure in August: 1010.2mbar

The month with the highest atmospheric pressure is November (1018.1mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).

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Average wind speed in August
Tokyo, Japan

Average wind speed in August - Tokyo, Japan
  • Average wind speed in August: 12.5km/h

The windiest month (with the highest average wind speed) is April (15.3km/h).
The calmest month (with the lowest average wind speed) is November (12.1km/h).

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Average humidity in August
Tokyo, Japan

Average humidity in August - Tokyo, Japan
  • Average humidity in August: 73%

The month with the highest relative humidity is July (77%).
The month with the lowest relative humidity is January (59%).

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Average rainfall in August
Tokyo, Japan

Average rainfall in August - Tokyo, Japan
  • Average rainfall in August: 26mm

The wettest month (with the highest rainfall) is October (51mm).
The driest month (with the least rainfall) is December (21mm).

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Average rainfall days in August
Tokyo, Japan

Average rainfall days in August - Tokyo, Japan
  • Average rainfall days in August: 9.7 days

The month with the highest number of rainy days is March (14.3 days).
The month with the least rainy days is January (7.3 days).

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Average snowfall in August
Tokyo, Japan

Average snowfall in August - Tokyo, Japan
  • Average snowfall in August: 0mm

The month with the highest snowfall is February (21mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).

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Average snowfall days in August
Tokyo, Japan

Average snowfall days in August - Tokyo, Japan
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (2.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

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Average sea temperature in August
Tokyo, Japan

Average sea temperature in August - Tokyo, Japan
  • Average sea temperature in August: 25.7°C

The best month for swimming (with the highest average sea temperature) is August (25.7°C).
The coldest month (with the lowest average sea temperature) is February (14°C).

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Average daylight in August /
Average sunshine in August
Tokyo, Japan

Average daylight in August / Average sunshine in August - Tokyo, Japan
  • Average daylight in August: 13h and 29min

The month with the longest days is June (Average daylight: 14h and 32min).
The month with the shortest days is December (Average daylight: 9h and 47min).

  • Average sunshine in August: 10h and 18min

The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 5h and 48min).

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Average sunshine days in August
Tokyo, Japan

Average sunshine days in August - Tokyo, Japan
  • Average sunshine days in August: 19.1 days

The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is June (14.4 days).

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Average UV index in August
Tokyo, Japan

Average UV index in August - Tokyo, Japan
  • Average UV index in August: 6

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 3).

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Average cloud cover in August
Tokyo, Japan

Average cloud cover in August - Tokyo, Japan
  • Average cloud cover in August: 33

The months with the most cloud cover are June and October (Cloud cover 43).
The month with the least cloud cover is January (Cloud cover 28).

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Average visibility in August
Tokyo, Japan

Average visibility in August - Tokyo, Japan
  • Average visibility in August: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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